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In organometallic chemistry
Organometallic chemistry is the study of organometallic compounds, chemical compounds containing at least one chemical bond between a carbon atom of an organic molecule and a metal, including alkali, alkaline earth, and transition metals, and so ...
, a flyover complex features two metals bridged by the fragment OC(RC=CR)2. Some flyover complexes are symmetrical and some are not.
Common examples are the iron carbonyl derivatives, which are typically air-stable, soluble in nonpolar solvents, and red-orange in color. These diiron complexes arise by the reaction of alkyne
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Acetylene
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Propyne
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1-Butyne
In organic chemistry, an alkyne is an unsaturated hydrocarbon containing at least one carbon—carbon triple bond. The simplest acyclic alkynes with only one triple bond and n ...
s with iron carbonyls. Such reactions are known to generate many products, e.g. complexes of cyclopentadienones and para-quinone
The quinones are a class of organic compounds that are formally "derived from aromatic compounds
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Some uch as benzene or naphthalene
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by conversion of an even number of –CH= groups into –C(=O)– groups with any necessary rearrangement of double ...ferrole
In organoiron chemistry, a ferrole is a type of diiron complex containing the (OC)3FeC4R4 heterocycle that is pi-bonded to a Fe(CO)3 group. These compounds have Fe-Fe bonds (ca. 252 pm) and semi-bridging CO ligands (Fe-C distances = 178, 251 ...
complexes react with tertiary phosphines to give the substituted flyover complex Fe2(CO)5(PR3)(C4R4CO). They insert alkynes en route to tropones (R6C7O). {{cite book , doi=10.1016/B978-008046519-7.00058-7, chapter=Dinuclear Iron Compounds with Hydrocarbon Ligands, title=Comprehensive Organometallic Chemistry II, year=1995, last1=Fagan, first1=Paul J., pages=231–258, isbn=9780080465197
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